* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  max-width: 750px;
  min-width: 300px;
  font-size: 15px;
  background-color: whitesmoke;
}

header {
  width: 100%;
  height: 1.5rem;
  line-height: 1.5rem;
  background-color: white;
  display: flex;
  font-size: .15rem;
}

header .left {
  width: 15%;
  text-align: center;
}

header .title {
  width: 70%;
  text-align: center;
}

.box {
  width: 4rem;
  height: 4rem;
  border-radius: 2.25rem;
  color: white;
  font-size: 2.8rem;
  text-align: center;
  margin: 2rem auto;
  line-height: 4rem;
  background-color: hotpink;
}

.box1 {
  font-size: 1rem;
  text-align: center;
  margin-bottom: .7rem;
}

.box2 {
  text-align: center;
  font-size: .3rem;
  color: #66666f;
  margin-bottom: 2rem;
}

.box3 {
  width: 65%;
  height: 2rem;
  line-height: 2rem;
  text-align: center;
  margin: 0 auto;
  background-color: hotpink;
  color: white;
  font-size: .3rem;
  border-radius: .5rem;
}

.box4 {
  width: 65%;
  height: 2rem;
  line-height: 2rem;
  text-align: center;
  margin: 0 auto;
  background-color: transparent;
  border: 1px solid #ddd;
  color: hotpink;
  font-size: .3rem;
  border-radius: .5rem;
}
